
.banner{
    background-image: url("../img/about_bg.jpg");
    background-size: 100% 100%;
    height: calc(1000*480px/1920);
}
.about-middlepic{
    display: flex;
    /*justify-items: center;*/
    justify-content: center;
}
.about-middlepic>div:not(div:nth-last-child(1)){
    margin-right: 115px;
}
.about-middlepic>div{
    margin-top: 20px;
    margin-bottom: 20px;
}
.about-middlepic>div>div:nth-child(2){
    display: flex;
    justify-content: center;
}
.about-middlepic>div>div:nth-child(3){
    display: flex;
    justify-content: center;

}
.content{
    display: flex;
    flex-wrap: wrap;
    margin-top: 30px;
}


